He did split 45.6 in that relay despite the stumble continuing past the start line for him. That is very impressive for an 800m/1500m guy. He looks exceptionally fluid at speed as well in the race after nearly falling. I wonder what he could have run in the 1500m in 1981 with an El Guerrouj in the race (but epo unavailable to Coe, who would have had only the possibility of blood doping and steroids still).